31133013131312 has 20 divisors (see below), whose sum is σ = 60378606210120. Its totient is φ = 15551437335168.

The previous prime is 31133013131263. The next prime is 31133013131351. The reversal of 31133013131312 is 21313131033113.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 941809862 + ... + 941842917.

It is an arithmetic number, because the mean of its divisors is an integer number (3018930310506).

Almost surely, 2^{31133013131312} is an apocalyptic number.

It is an amenable number.

31133013131312 is a deficient number, since it is larger than the sum of its proper divisors (29245593078808).

31133013131312 is a wasteful number, since it uses less digits than its factorization.

31133013131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883653820 (or 1883653814 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 26.

Adding to 31133013131312 its reverse (21313131033113), we get a palindrome (52446144164425).

The spelling of 31133013131312 in words is "thirty-one trillion, one hundred thirty-three billion, thirteen million, one hundred thirty-one thousand, three hundred twelve".